<template>
  <a-layout>
    <a-layout-content
            :style="{ background: '#fff', padding: '24px', margin: 0, minHeight: '280px' }"
    >
      <p>
        <a-form layout="inline" :model="param">
          <a-form-item>

            <a-button type="primary" @click="handleQuery()">
              查询
            </a-button>
          </a-form-item>
          <a-form-item>
            <a-button type="primary" @click="add()">
              新增
            </a-button>
          </a-form-item>
        </a-form>


      </p>
      <a-table
              :columns="columns"
              :row-key="record => record.id"
              :data-source="level1"
              :loading="loading"
              :pagination="false"
      >
        <template #cover="{ text: cover }">
          <img v-if="cover" :src="cover" alt="avatar" />
        </template>
        <template v-slot:action="{ text, record }">
          <a-space size="small">
            <a-button type="primary" @click="edit(record)">
              编辑
            </a-button>
            <a-popconfirm
                    title="删除后不可恢复，确认删除?"
                    ok-text="是"
                    cancel-text="否"
                    @confirm="handleDelete(record.id)"
            >
              <a-button type="danger" >
                删除
              </a-button>
            </a-popconfirm>
          </a-space>
        </template>
      </a-table>
    </a-layout-content>
  </a-layout>

  <a-modal
          title="文档表单"
          v-model:visible="modalVisible"
          :confirm-loading="modalLoading"
          @ok="handleModalOk"
  >
    <a-form :model="doc" :label-col="{ span: 6 }" :wrapper-col="{ span: 18 }">

      <a-form-item label="名称">
        <a-input v-model:value="doc.name" />
      </a-form-item>
      <a-form-item label="父文档">
        <a-tree-select
                v-model:value="doc.parent"
                style="width: 100%"
                :dropdown-style="{ maxHeight: '400px', overflow: 'auto' }"
                :tree-data="treeSelectData"
                placeholder="请选择父文档"
                tree-default-expand-all
                :replaceFields="{title: 'name', key: 'id', value: 'id'}"
        >
        </a-tree-select>
      </a-form-item>

      <a-form-item label="排序">
        <a-input v-model:value="doc.sort" type="textarea" />
      </a-form-item>
    </a-form>


  </a-modal>
</template>

<script lang="ts">
  import { defineComponent, onMounted, ref } from 'vue';
  import axios from 'axios';
  import { message } from 'ant-design-vue';
  import {Tool} from "@/util/tool";

  export default defineComponent({
    name: 'AdminDoc',
    setup() {
      const param = ref();
      param.value = {};
      const docs = ref();
      const loading = ref(false);

      const columns = [

        {
          title: '名称',
          dataIndex: 'name'
        },
        {
          title: '父分类',
          key: 'parent',
          dataIndex: 'parent'
        },

        {
          title: '排序',
          dataIndex: 'sort'
        },

        {
          title: 'Action',
          key: 'action',
          slots: { customRender: 'action' }
        }
      ];

      /**
       * 一级分类树，children属性就是二级分类
       * [{
       *   id: "",
       *   name: "",
       *   children: [{
       *     id: "",
       *     name: "",
       *   }]
       * }]
       */
      const level1 = ref(); // 一级分类树，children属性就是二级分类

      /**
       * 数据查询
       **/
      const handleQuery = () => {
        loading.value = true;
        // 如果不清空现有数据，则编辑保存重新加载数据后，再点编辑，则列表显示的还是编辑前的数据
        level1.value = [];
        axios.get("/doc/all").then((response) => {
          loading.value = false;
          const data = response.data;
          if(data.success){
            docs.value = data.content;
            console.log("原始数组",docs.value)

            level1.value=[];
            level1.value=Tool.array2Tree(docs.value,0);
            console.log("树形结构",level1)

          }
          else{
            message.error(data.message);
          }
        });
      };


      // -------- 表单 ---------
      // 因为树选择组件的属性状态，会随当前编辑的节点而变化，所以单独声明一个响应式变量
      const treeSelectData = ref();
      treeSelectData.value = [];
      const doc=ref({});
      const modalVisible = ref(false);
      const modalLoading = ref(false);
      const handleModalOk = () => {
        modalLoading.value = true;
        axios.post("/doc/save", doc.value).then((response) => {
          modalLoading.value = false;
          const data = response.data;
          if(data.success){
            modalVisible.value = false;
            //重新加载列表
            handleQuery();
          }else{
            message.error(data.message)
          }
        });
      };

      /**
       * 将某节点及其子孙节点全部置为disabled
       */
      const setDisable = (treeSelectData: any, id: any) => {
        // console.log(treeSelectData, id);
        // 遍历数组，即遍历某一层节点
        for (let i = 0; i < treeSelectData.length; i++) {
          const node = treeSelectData[i];
          if (node.id === id) {
            // 如果当前节点就是目标节点
            console.log("disabled", node);
            // 将目标节点设置为disabled
            node.disabled = true;

            // 遍历所有子节点，将所有子节点全部都加上disabled
            const children = node.children;
            if (Tool.isNotEmpty(children)) {
              for (let j = 0; j < children.length; j++) {
                setDisable(children, children[j].id)
              }
            }
          } else {
            // 如果当前节点不是目标节点，则到其子节点再找找看。
            const children = node.children;
            if (Tool.isNotEmpty(children)) {
              setDisable(children, id);
            }
          }
        }
      };



      /**
       * 编辑
       */
      const edit = (record:any) => {
        modalVisible.value = true;
        doc.value=Tool.copy(record);


        // 不能选择当前节点及其所有子孙节点，作为父节点，会使树断开
        treeSelectData.value = Tool.copy(level1.value);
        setDisable(treeSelectData.value, record.id);

        // 为选择树添加一个"无"
        treeSelectData.value.unshift({id: 0, name: '无'});
      };

      /**
       * 新增
       */
      const add = () => {
        modalVisible.value = true;
        doc.value={}


        treeSelectData.value = Tool.copy(level1.value);

        // 为选择树添加一个"无"
        treeSelectData.value.unshift({id: 0, name: '无'});

      };

      const handleDelete = (id:number) => {
        axios.delete("/doc/delete/"+id).then((response) => {

          const data = response.data;
          //重新加载列表 --------------------------------相比较源码没加if判断
          if(data.success){
            handleQuery();
          }
        });
      };


      onMounted(() => {
        handleQuery();
      });

      return {
        param,
      //  docs,
        level1,
        columns,
        loading,

        handleQuery,


        edit,
        add,


        doc,
        modalVisible,
        modalLoading,
        handleModalOk,

        handleDelete,
        treeSelectData

      }
    }
  });
</script>

<style scoped>
  img {
    width: 50px;
    height: 50px;
  }
</style>